LOD_D of a car is completely black, if it's generated with the LOD generator of Content Manager ("Generate LODs" under "Manage cars" of a car - only in the paid version of CM) and the car has no seperated car paint meshes. To avoid this, you have to remove "!$CarPaint" under the settings "MERGE AS BLACK" of LOD D. But be aware, that the resulting LOD_D will be less optimized and have more "Objects" and "Materials".
View attachment 1272772
View attachment 1272773
EDIT: I've checked the car "Ferrari 365 GTB/4 Daytona Competizione" and the problem isn't a black LOD_D. The distance values in lods.ini are wrong. Change lods.ini to:
[COCKPIT_HR]
DISTANCE_SWITCH=7
[LOD_0]
FILE=daytona.kn5
IN=0
OUT=12
[LOD_1]
FILE=daytona_lodA.kn5
IN=12
OUT=45
[LOD_2]
FILE=daytona_lodB.kn5
IN=45
OUT=220
[LOD_3]
FILE=daytona_lodC.kn5
IN=220
OUT=2000
EDIT 2:
The car has also a problem in tyres.ini.
PERFORMANCE_CURVE=tcurve_soft.lut
should be changed to (2 times in tyres.ini)
PERFORMANCE_CURVE=tcurve.lut